-- The GHC interface
import qualified GHC
-import GHC ( Session, verbosity, dopt, DynFlag(..),
+import GHC ( Session, verbosity, dopt, DynFlag(..), Target(..),
+ TargetId(..),
mkModule, pprModule, Type, Module, SuccessFlag(..),
TyThing(..), Name, LoadHowMuch(..), Phase,
GhcException(..), showGhcException,
- CheckedModule(..) )
+ CheckedModule(..), SrcLoc )
+import PprTyThing
import Outputable
-- for createtags (should these come via GHC?)
import OccName( pprOccName )
import SrcLoc( isGoodSrcLoc, srcLocFile, srcLocLine, srcLocCol )
--- following all needed for :info... ToDo: remove
-import IfaceSyn ( IfaceDecl(..), IfaceClassOp(..), IfaceConDecls(..),
- IfaceConDecl(..), IfaceType,
- pprIfaceDeclHead, pprParendIfaceType,
- pprIfaceForAllPart, pprIfaceType )
-import FunDeps ( pprFundeps )
-import SrcLoc ( SrcLoc, pprDefnLoc )
-import OccName ( OccName, parenSymOcc, occNameUserString )
-import BasicTypes ( StrictnessMark(..), defaultFixity, failed, successIf )
-
-- Other random utilities
+import Digraph ( flattenSCCs )
+import BasicTypes ( failed, successIf )
import Panic ( panic, installSignalHandlers )
import Config
import StaticFlags ( opt_IgnoreDotGhci )
import Linker ( showLinkerState )
import Util ( removeSpaces, handle, global, toArgs,
looksLikeModuleName, prefixMatch, sortLe )
-import ErrUtils ( printErrorsAndWarnings )
#ifndef mingw32_HOST_OS
import System.Posix
import Numeric
import Data.List
import Data.Int ( Int64 )
-import Data.Maybe ( isJust )
+import Data.Maybe ( isJust, fromMaybe, catMaybes )
import System.Cmd
import System.CPUTime
import System.Environment
("check", keepGoing checkModule),
("set", keepGoing setCmd),
("show", keepGoing showCmd),
- ("tags", keepGoing createTagsFileCmd),
+ ("etags", keepGoing createETagsFileCmd),
+ ("ctags", keepGoing createCTagsFileCmd),
("type", keepGoing typeOfExpr),
("kind", keepGoing kindOfType),
("unset", keepGoing unsetOptions),
" :show modules show the currently loaded modules\n" ++
" :show bindings show the current bindings made at the prompt\n" ++
"\n" ++
- " :tags -e|-c create tags file for Vi (-c) or Emacs (-e)\n" ++
+ " :ctags [<file>] create tags file for Vi (default: \"tags\")\n" ++
+ " :etags [<file>] create tags file for Emacs (defauilt: \"TAGS\")\n" ++
" :type <expr> show the type of <expr>\n" ++
" :kind <type> show the kind of <type>\n" ++
" :undef <cmd> undefine user-defined command :<cmd>\n" ++
Readline.initialize
#endif
-#if defined(mingw32_HOST_OS)
- -- The win32 Console API mutates the first character of
- -- type-ahead when reading from it in a non-buffered manner. Work
- -- around this by flushing the input buffer of type-ahead characters.
- --
- GHC.ConsoleHandler.flushConsole stdin
-#endif
startGHCi (runGHCi srcs maybe_expr)
GHCiState{ progname = "<interactive>",
args = [],
case maybe_expr of
Nothing ->
+#if defined(mingw32_HOST_OS)
+ do
+ -- The win32 Console API mutates the first character of
+ -- type-ahead when reading from it in a non-buffered manner. Work
+ -- around this by flushing the input buffer of type-ahead characters,
+ -- but only if stdin is available.
+ flushed <- io (IO.try (GHC.ConsoleHandler.flushConsole stdin))
+ case flushed of
+ Left err | isDoesNotExistError err -> return ()
+ | otherwise -> io (ioError err)
+ Right () -> return ()
+#endif
-- enter the interactive loop
interactiveLoop is_tty show_prompt
Just expr -> do
runCommand :: String -> GHCi Bool
runCommand c = ghciHandle handler (doCommand c)
+ where
+ doCommand (':' : command) = specialCommand command
+ doCommand stmt
+ = do timeIt (do nms <- runStmt stmt; finishEvalExpr nms)
+ return False
-- This version is for the GHC command-line option -e. The only difference
-- from runCommand is that it catches the ExitException exception and
handleEval e = do showException e
io (exitWith (ExitFailure 1))
+ doCommand (':' : command) = specialCommand command
+ doCommand stmt
+ = do nms <- runStmt stmt
+ case nms of
+ Nothing -> io (exitWith (ExitFailure 1))
+ -- failure to run the command causes exit(1) for ghc -e.
+ _ -> finishEvalExpr nms
+
-- This is the exception handler for exceptions generated by the
-- user's code; it normally just prints out the exception. The
-- handler must be recursive, in case showing the exception causes
showException other_exception
= io (putStrLn ("*** Exception: " ++ show other_exception))
-doCommand (':' : command) = specialCommand command
-doCommand stmt
- = do timeIt (do nms <- runStmt stmt; finishEvalExpr nms)
- return False
-
-runStmt :: String -> GHCi [Name]
+runStmt :: String -> GHCi (Maybe [Name])
runStmt stmt
- | null (filter (not.isSpace) stmt) = return []
+ | null (filter (not.isSpace) stmt) = return (Just [])
| otherwise
= do st <- getGHCiState
session <- getSession
result <- io $ withProgName (progname st) $ withArgs (args st) $
GHC.runStmt session stmt
case result of
- GHC.RunFailed -> return []
+ GHC.RunFailed -> return Nothing
GHC.RunException e -> throw e -- this is caught by runCommand(Eval)
- GHC.RunOk names -> return names
+ GHC.RunOk names -> return (Just names)
-- possibly print the type and revert CAFs after evaluating an expression
-finishEvalExpr names
+finishEvalExpr mb_names
= do b <- isOptionSet ShowType
session <- getSession
- when b (mapM_ (showTypeOfName session) names)
+ case mb_names of
+ Nothing -> return ()
+ Just names -> when b (mapM_ (showTypeOfName session) names)
flushInterpBuffers
io installSignalHandlers
; let exts = dopt Opt_GlasgowExts dflags
; mapM_ (infoThing exts session) names }
where
- infoThing exts session name
- = do { stuff <- io (GHC.getInfo session name)
- ; unqual <- io (GHC.getPrintUnqual session)
- ; io (putStrLn (showSDocForUser unqual $
- vcat (intersperse (text "") (map (showThing exts) stuff)))) }
-
-showThing :: Bool -> GHC.GetInfoResult -> SDoc
-showThing exts (wanted_str, thing, fixity, src_loc, insts)
- = vcat [ showWithLoc src_loc (showDecl exts want_name thing),
- show_fixity fixity,
- vcat (map show_inst insts)]
+ infoThing exts session str = io $ do
+ names <- GHC.parseName session str
+ let filtered = filterOutChildren names
+ mb_stuffs <- mapM (GHC.getInfo session) filtered
+ unqual <- GHC.getPrintUnqual session
+ putStrLn (showSDocForUser unqual $
+ vcat (intersperse (text "") $
+ [ pprInfo exts stuff | Just stuff <- mb_stuffs ]))
+
+ -- Filter out names whose parent is also there Good
+ -- example is '[]', which is both a type and data
+ -- constructor in the same type
+filterOutChildren :: [Name] -> [Name]
+filterOutChildren names = filter (not . parent_is_there) names
+ where parent_is_there n
+ | Just p <- GHC.nameParent_maybe n = p `elem` names
+ | otherwise = False
+
+pprInfo exts (thing, fixity, insts)
+ = pprTyThingInContextLoc exts thing
+ $$ show_fixity fixity
+ $$ vcat (map GHC.pprInstance insts)
where
- want_name occ = wanted_str == occNameUserString occ
-
show_fixity fix
- | fix == defaultFixity = empty
- | otherwise = ppr fix <+> text wanted_str
-
- show_inst (inst_ty, loc)
- = showWithLoc loc (ptext SLIT("instance") <+> ppr inst_ty)
-
-showWithLoc :: SrcLoc -> SDoc -> SDoc
-showWithLoc loc doc
- = hang doc 2 (char '\t' <> comment <+> pprDefnLoc loc)
- -- The tab tries to make them line up a bit
- where
- comment = ptext SLIT("--")
-
-
--- Now there is rather a lot of goop just to print declarations in a
--- civilised way with "..." for the parts we are less interested in.
-
-showDecl :: Bool -> (OccName -> Bool) -> IfaceDecl -> SDoc
-showDecl exts want_name (IfaceForeign {ifName = tc})
- = ppr tc <+> ptext SLIT("is a foreign type")
-
-showDecl exts want_name (IfaceId {ifName = var, ifType = ty})
- = ppr var <+> dcolon <+> showIfaceType exts ty
-
-showDecl exts want_name (IfaceSyn {ifName = tycon, ifTyVars = tyvars, ifSynRhs = mono_ty})
- = hang (ptext SLIT("type") <+> pprIfaceDeclHead [] tycon tyvars)
- 2 (equals <+> ppr mono_ty)
-
-showDecl exts want_name (IfaceData {ifName = tycon,
- ifTyVars = tyvars, ifCons = condecls, ifCtxt = context})
- = hang (pp_nd <+> pprIfaceDeclHead context tycon tyvars)
- 2 (add_bars (ppr_trim show_con cs))
- where
- show_con (IfVanillaCon { ifConOcc = con_name, ifConInfix = is_infix, ifConArgTys = tys,
- ifConStricts = strs, ifConFields = flds})
- | want_name tycon || want_name con_name || any want_name flds
- = Just (show_guts con_name is_infix tys_w_strs flds)
- | otherwise = Nothing
- where
- tys_w_strs = tys `zip` (strs ++ repeat NotMarkedStrict)
- show_con (IfGadtCon { ifConOcc = con_name, ifConTyVars = tvs, ifConCtxt = theta,
- ifConArgTys = arg_tys, ifConResTys = res_tys, ifConStricts = strs })
- | want_name tycon || want_name con_name
- = Just (ppr_bndr con_name <+> colon <+> pprIfaceForAllPart tvs theta pp_tau)
- | otherwise = Nothing
- where
- tys_w_strs = arg_tys `zip` (strs ++ repeat NotMarkedStrict)
- pp_tau = foldr add pp_res_ty tys_w_strs
- pp_res_ty = ppr_bndr tycon <+> hsep (map pprParendIfaceType res_tys)
- add bty pp_ty = ppr_bangty bty <+> arrow <+> pp_ty
-
- show_guts con True [ty1, ty2] flds = sep [ppr_bangty ty1, ppr con, ppr_bangty ty2]
- show_guts con _ tys [] = ppr_bndr con <+> sep (map ppr_bangty tys)
- show_guts con _ tys flds
- = ppr_bndr con <+> braces (sep (punctuate comma (ppr_trim show_fld (tys `zip` flds))))
- where
- show_fld (bty, fld) | want_name tycon || want_name con || want_name fld
- = Just (ppr_bndr fld <+> dcolon <+> ppr_bangty bty)
- | otherwise = Nothing
-
- (pp_nd, cs) = case condecls of
- IfAbstractTyCon -> (ptext SLIT("data"), [])
- IfDataTyCon cs -> (ptext SLIT("data"), cs)
- IfNewTyCon c -> (ptext SLIT("newtype"),[c])
-
- add_bars [] = empty
- add_bars [c] = equals <+> c
- add_bars (c:cs) = equals <+> sep (c : map (char '|' <+>) cs)
-
- ppr_bangty (ty, str) = ppr_str str <> pprParendIfaceType ty
- ppr_str MarkedStrict = char '!'
- ppr_str MarkedUnboxed = ptext SLIT("!!")
- ppr_str NotMarkedStrict = empty
-
-showDecl exts want_name (IfaceClass {ifCtxt = context, ifName = clas, ifTyVars = tyvars,
- ifFDs = fds, ifSigs = sigs})
- = hang (ptext SLIT("class") <+> pprIfaceDeclHead context clas tyvars
- <+> pprFundeps fds <+> opt_where)
- 2 (vcat (ppr_trim show_op sigs))
- where
- opt_where | null sigs = empty
- | otherwise = ptext SLIT("where")
- show_op (IfaceClassOp op dm ty)
- | want_name clas || want_name op
- = Just (ppr_bndr op <+> dcolon <+> showIfaceType exts ty)
- | otherwise
- = Nothing
-
-showIfaceType :: Bool -> IfaceType -> SDoc
-showIfaceType True ty = pprIfaceType ty -- -fglasgow-exts: print with the foralls
-showIfaceType False ty = ppr ty -- otherwise, print without the foralls
-
-ppr_trim :: (a -> Maybe SDoc) -> [a] -> [SDoc]
-ppr_trim show xs
- = snd (foldr go (False, []) xs)
- where
- go x (eliding, so_far)
- | Just doc <- show x = (False, doc : so_far)
- | otherwise = if eliding then (True, so_far)
- else (True, ptext SLIT("...") : so_far)
-
-ppr_bndr :: OccName -> SDoc
--- Wrap operators in ()
-ppr_bndr occ = parenSymOcc occ (ppr occ)
-
+ | fix == GHC.defaultFixity = empty
+ | otherwise = ppr fix <+> ppr (GHC.getName thing)
-----------------------------------------------------------------------------
-- Commands
io $ putStr "Warning: changing directory causes all loaded modules to be unloaded,\nbecause the search path has changed.\n"
io (GHC.setTargets session [])
io (GHC.load session LoadAllTargets)
- setContextAfterLoad []
+ setContextAfterLoad session []
io (GHC.workingDirectoryChanged session)
dir <- expandPath dir
io (setCurrentDirectory dir)
checkModule m = do
let modl = mkModule m
session <- getSession
- result <- io (GHC.checkModule session modl printErrorsAndWarnings)
+ result <- io (GHC.checkModule session modl)
case result of
Nothing -> io $ putStrLn "Nothing"
Just r -> io $ putStrLn (showSDoc (
afterLoad ok session = do
io (revertCAFs) -- always revert CAFs on load.
graph <- io (GHC.getModuleGraph session)
- let mods = map GHC.ms_mod graph
- mods' <- filterM (io . GHC.isLoaded session) mods
- setContextAfterLoad mods'
- modulesLoadedMsg ok mods'
+ graph' <- filterM (io . GHC.isLoaded session . GHC.ms_mod) graph
+ setContextAfterLoad session graph'
+ modulesLoadedMsg ok (map GHC.ms_mod graph')
-setContextAfterLoad [] = do
- session <- getSession
+setContextAfterLoad session [] = do
io (GHC.setContext session [] [prelude_mod])
-setContextAfterLoad (m:_) = do
- session <- getSession
- b <- io (GHC.moduleIsInterpreted session m)
- if b then io (GHC.setContext session [m] [])
- else io (GHC.setContext session [] [m])
+setContextAfterLoad session ms = do
+ -- load a target if one is available, otherwise load the topmost module.
+ targets <- io (GHC.getTargets session)
+ case [ m | Just m <- map (findTarget ms) targets ] of
+ [] ->
+ let graph' = flattenSCCs (GHC.topSortModuleGraph True ms Nothing) in
+ load_this (last graph')
+ (m:_) ->
+ load_this m
+ where
+ findTarget ms t
+ = case filter (`matches` t) ms of
+ [] -> Nothing
+ (m:_) -> Just m
+
+ summary `matches` Target (TargetModule m) _
+ = GHC.ms_mod summary == m
+ summary `matches` Target (TargetFile f _) _
+ | Just f' <- GHC.ml_hs_file (GHC.ms_location summary) = f == f'
+ summary `matches` target
+ = False
+
+ load_this summary | m <- GHC.ms_mod summary = do
+ b <- io (GHC.moduleIsInterpreted session m)
+ if b then io (GHC.setContext session [m] [])
+ else io (GHC.setContext session [] [prelude_mod,m])
+
modulesLoadedMsg :: SuccessFlag -> [Module] -> GHCi ()
modulesLoadedMsg ok mods = do
-----------------------------------------------------------------------------
-- create tags file for currently loaded modules.
-createTagsFileCmd :: String -> GHCi ()
-createTagsFileCmd "-c" = ghciCreateTagsFile CTags "tags"
-createTagsFileCmd "-e" = ghciCreateTagsFile ETags "TAGS"
-createTagsFileCmd _ = throwDyn (CmdLineError "syntax: :tags -c|-e")
+createETagsFileCmd, createCTagsFileCmd :: String -> GHCi ()
+
+createCTagsFileCmd "" = ghciCreateTagsFile CTags "tags"
+createCTagsFileCmd file = ghciCreateTagsFile CTags file
+
+createETagsFileCmd "" = ghciCreateTagsFile ETags "TAGS"
+createETagsFileCmd file = ghciCreateTagsFile ETags file
data TagsKind = ETags | CTags
(as,bs) <- io (GHC.getContext s)
io (if exports_only then GHC.setContext s [] [prelude_mod,modl]
else GHC.setContext s [modl] [])
+ unqual <- io (GHC.getPrintUnqual s)
io (GHC.setContext s as bs)
- things <- io (GHC.browseModule s modl exports_only)
- unqual <- io (GHC.getPrintUnqual s)
+ mb_mod_info <- io $ GHC.getModuleInfo s modl
+ case mb_mod_info of
+ Nothing -> throwDyn (CmdLineError ("unknown module: " ++ m))
+ Just mod_info -> do
+ let names
+ | exports_only = GHC.modInfoExports mod_info
+ | otherwise = fromMaybe [] (GHC.modInfoTopLevelScope mod_info)
- dflags <- getDynFlags
- let exts = dopt Opt_GlasgowExts dflags
- io (putStrLn (showSDocForUser unqual (
- vcat (map (showDecl exts (const True)) things)
- )))
+ filtered = filterOutChildren names
+
+ things <- io $ mapM (GHC.lookupName s) filtered
+
+ dflags <- getDynFlags
+ let exts = dopt Opt_GlasgowExts dflags
+ io (putStrLn (showSDocForUser unqual (
+ vcat (map (pprTyThingInContext exts) (catMaybes things))
+ )))
+ -- ToDo: modInfoInstances currently throws an exception for
+ -- package modules. When it works, we can do this:
+ -- $$ vcat (map GHC.pprInstance (GHC.modInfoInstances mod_info))
-----------------------------------------------------------------------------
-- Setting the module context
projects / ghc-hetmet.git / blobdiff